Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8de4bc47c207fafac24daf3c0aff99118e392b2ff6de64a03fb7a31c13f1cbee' 
  AND token = 'jPaqrLlLoA8wC2ZEV8GZfCM6gKtUfaIkVUtQsIVeQw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}